Detection system and method for determining a gas component

Abstract

The application discloses a detection system and method for determining gas components. The detection system comprises a sampling device, a first detection device and a second detection device. The sampling device comprises a flow guide, a first containing device and a trap conveying assembly. The medium to be detected flows into the conveying device through the flow guide, and is buffered and retained in the first containing device. After the medium to be detected is buffered in the first containing device, the medium to be detected is introduced into the trap, the component to be detected is intercepted, and the initial filtration medium is discharged. The medium to be detected is buffered and retained in the first containing device. During the process of filling the first containing device, the clogging can be reduced, and the medium to be detected can be branched. When the first containing device is filled with the medium to be detected, the flow rate of the medium to be detected can be controlled through the trap conveying assembly, and part of the components of the medium to be detected can be intercepted, so that the accuracy of the detection result is improved.

Description

Technical Field

[0001] This application belongs to the field of gas component detection technology, and in particular relates to a detection system and method for determining gas components. Background Technology

[0002] Waste gas refers to coal gas containing dust. It cannot be directly supplied to users and must undergo dust removal treatment. The furnace dust in waste gas can clog pipelines during transportation, and the alkaline substances in the dust may fuse with acidic refractory materials (slagging) at high temperatures during combustion, thus reducing the performance and service life of equipment such as coke oven combustion chambers and hot blast stove regenerators. Therefore, detecting the component content in waste gas is crucial.

[0003] Existing detection devices for coal gas and other fuel gases typically use filter membranes or filter cartridges for sampling and testing. However, due to clogging or damage to the filter membrane, or the failure to consider the distribution of components in the sampled gas, the accuracy of the test results is affected. Summary of the Invention

[0004] This application provides a detection system and method for determining the components of a gas, aiming to provide a more accurate detection system and method for measuring the content of impurity components in gas.

[0005] In a first aspect, embodiments of this application provide a detection system for determining the components of a fuel gas, comprising:

[0006] The sampling device includes a flow guide, a first receiving device, and a interceptor conveying assembly that are interconnected. The medium to be tested flows into the first receiving device via the flow guide for buffering and retention. After being buffered by the first receiving device, the medium to be tested is passed into the interceptor conveying assembly for interception of the components to be tested, and then the initial filter medium is discharged.

[0007] The first detection device, connected to the sampling device, is used to determine the total volume of the medium to be detected in the sampling device; and

[0008] The second detection device is used to determine the content of the liquid phase component in the test medium buffered and retained in the first containment device.

[0009] According to an embodiment of the first aspect of this application, the guide includes a gas inlet that extends into the first receiving device.

[0010] According to an embodiment of the first aspect of this application, the guide further includes a first airflow distribution member, which is disposed at the outlet of the first receiving device where the gas inlet member is located, and the first airflow distribution member is used to transport the medium to be tested.

[0011] According to an embodiment of the first aspect of this application, the first airflow distribution member is a first airflow plate, and the first airflow plate has a plurality of first through holes.

[0012] According to an embodiment of the first aspect of this application, the interceptor delivery assembly includes a second receiving device and a packing material filled in the second receiving device, wherein pores are formed in the packing material for intercepting the component to be detected.

[0013] According to an embodiment of the first aspect of this application, a second airflow distribution component is provided at the junction of the first receiving device and the interceptor conveying assembly;

[0014] Optionally, the second airflow distribution component is a second airflow plate, which has a plurality of second through holes.

[0015] According to an embodiment of the first aspect of this application, the detection system further includes a cooling component disposed around the first receiving device and the interceptor conveying component, for cooling and intercepting the analyte in the first receiving device and the interceptor conveying component.

[0016] According to an embodiment of the first aspect of this application, the cooling assembly includes a first cooling element and a second cooling element.

[0017] The first cooling element is located around the first containing device and is used to cool and liquefy some components of the medium to be tested in the first containing device.

[0018] The second cooling element is located around the interceptor conveying assembly and is used to cool and intercept some components of the medium to be tested in the interceptor conveying assembly.

[0019] According to an embodiment of the first aspect of this application, the first cooling element is a refrigeration bath containing coolant, and the first receiving device is placed in the coolant.

[0020] Optionally, the target cooling temperature of the first cooling element is ≤20℃, or optionally ≤0℃.

[0021] According to the embodiment of the first aspect of this application, the second cooling element is a refrigeration jacket;

[0022] Optionally, the target cooling temperature of the second cooling element is ≤-20℃.

[0023] Secondly, embodiments of this application provide a detection method for determining gas composition using the detection system of the first aspect, comprising:

[0024] This causes the medium to be tested to be buffered and retained, thereby reducing the flow rate of the medium.

[0025] To retain at least some components in the medium to be tested, so as to obtain the initial filter medium;

[0026] Obtain the total volume of the medium to be tested from its inlet or outlet.

[0027] Obtain the mass of the retained component from the buffer retrieval point and the retention point;

[0028] The content of each component in the medium to be tested is obtained based on the total volume of the medium to be tested and the mass of the retained components.

[0029] According to the implementation method of the second aspect of this application, the method specifically includes:

[0030] Under the first cooling condition, the medium to be tested is buffered and retained to reduce the flow rate of the medium to be tested and to liquefy at least some components in the medium to be tested;

[0031] Under the second cooling condition, at least some components in the medium to be tested are retained to obtain the initial filter medium;

[0032] Obtain the total volume of the medium to be tested from its inlet or outlet.

[0033] The mass of the liquefied component and the mass of the retained dust were obtained from the buffer retention point and the interception point, respectively.

[0034] The content of each component in the medium to be tested is calculated based on the total volume of the medium to be tested, the mass of the liquefied components, and the mass of the trapped dust.

[0035] The detection system provided in this application includes a sampling device, a gas volume detection device, and a concentration detection device. By measuring the content of moisture and / or dust in the liquid mixture in the sampling device, the components of the medium to be tested can be determined. Furthermore, the first containing device and the interceptor conveying assembly can buffer and retain the high-flow-rate, high-temperature medium to be tested in the first containing device. During the filling process of the first containing device, clogging can be reduced and the medium to be tested can be diverted. After the medium to be tested fills the first containing device, the flow rate of the medium to be tested can be controlled by the interceptor conveying assembly, and some components of the medium to be tested can also be intercepted, further improving the accuracy of the detection results. Due to the combined action of the first containing device and the interceptor conveying assembly, the flow rate of the medium to be tested and the retention of components are controlled, avoiding easy clogging. This solves the problem of easy clogging and damage caused by using filter membranes or filter cartridges for sampling in the prior art, further improving the reliability of the detection results. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of a detection system for determining gas components provided in an embodiment of the first aspect of this application;

[0038] Figure 2 This is a schematic diagram of the structure of a detection system for determining gas components provided in another embodiment of the first aspect of this application;

[0039] Figure 3 This is a schematic flowchart of a detection method for determining gas components provided in the second aspect of this application.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100. Sampling device; 110. Flow guide; 111. Gas inlet; 112. Gas outlet; 113. First airflow distribution component; 120. First receiving device; 130. Retainer conveying assembly; 131. Packing material; 132. Second airflow distribution component; 200. First detection device; 300. Second detection device; 400. Cooling assembly; 410. First cooling component; 420. Second cooling component. Detailed Implementation

[0042] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0043] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] Due to factors such as excessively high gas flow rate, excessively high pressure, and excessively high oil dust content, during the sampling process...

[0046] The tar content in coke oven gas is usually tested by collecting samples and then performing the content analysis by gravimetric method; however, there is no corresponding national standard for the determination of tar content in coke oven gas.

[0047] In the relevant technology, GB12208-1990, "Determination of Tar and Dust Content in Urban Gas", uses the gravimetric method to determine the tar content in urban gas. However, due to the large sampling error and the inclusion of dust content or other factors in the tar content, the measurement results are significantly inaccurate and cannot be obtained.

[0048] In related technologies, the method for detecting coal gas components includes: connecting a sampling device to the main coal gas pipeline; the sampling device being a dried, weighing, and metering filter cartridge sampling device; tar and water adhering to the sampling device after the coal gas passes through it; connecting a wet gas flow meter after sampling; and removing the filter cartridge sampling device to directly determine its components. This sampling method has several drawbacks. During sampling, a high tar and dust content in the filter cartridge can easily clog the filter membrane, affecting the measurement results. Furthermore, during moisture determination, gas heating can easily cause moisture loss, leading to inaccurate measurement results.

[0049] Based on this, the inventor has developed a more accurate sampling device for gas detection systems, which can also improve the accuracy of moisture measurement.

[0050] To better understand this application, the following will be combined with... Figures 1 to 3 The detection system for determining the components of a gas fuel according to embodiments of this application will be described in detail.

[0051] Please see Figure 1 , Figure 1 This application illustrates a detection system for determining the components of a fuel gas, as provided in a first aspect of the present application, comprising:

[0052] The sampling device 100 includes a flow guide 110, a first receiving device 120 and a trap conveying assembly 130 that are interconnected. The medium to be tested flows into the first receiving device 120 through the flow guide 110 for buffering and retention. After being buffered by the first receiving device 120, the medium to be tested is passed into the trap conveying assembly 130 for trapping the components to be tested, and then the initial filter medium is discharged.

[0053] The first detection device 200, connected to the sampling device 100, is used to determine the total volume of the medium to be detected in the sampling device 100; and

[0054] The second detection device 300 is used to determine the content of liquid components in the test medium buffered and retained in the first containment device 110.

[0055] According to embodiments of this application, the medium to be detected can be a type of fuel gas; specifically, the medium to be detected can be raw coal gas, natural gas containing impurities, biogas containing impurities, etc. The first containing device 120 includes a containing cavity, which can be used to contain the medium to be detected or its liquidized components. Figure 1 The detection system shown can detect the liquid phase moisture, tar, and dust content in fuel gas. It employs a sampling device 100 containing a first receiving device 120 and a interceptor conveying assembly 130, avoiding the inaccuracy caused by simply using filters or filter membranes in related technologies, which are easily damaged. The above-mentioned detection system has a large sampling capacity and no clogging, making the sampling more representative and the measurement results more accurate. According to the embodiment of this application, the first detection device 200 is a wet gas flow meter, which can be installed at the input or discharge end of the guide member 110. The second detection device 300 can be a moisture content detector and a dust content detector. The moisture content detector can be used according to GB / T260 Petroleum Products Moisture Determination Method; the instrument used in this method is a 916 Karl Fischer moisture analyzer from Metrohm China Ltd., Switzerland. The dust content detector can be used according to GB / T511 Petroleum and Petroleum Products and Additives Mechanical Impurities Determination Method; the instrument used in this method is an ST-1550 mechanical impurities analyzer from Beijing Xuxin Instrument Equipment Co., Ltd. The moisture content detector and dust content detector mentioned above can be placed in a liquid mixture to detect the moisture content and dust content respectively. By calculation, the mass of moisture and dust in the medium to be tested can be obtained.

[0056] Please see Figure 2 , Figure 2 This application illustrates a detection system for determining the composition of a gas combustion gas, according to yet another embodiment of the present application.

[0057] like Figure 2As shown, one side of the guide member 110 in the sampling device 100 is connected to the gas delivery pipeline, allowing the gas in the delivery pipeline to be delivered to the sampling device. In some embodiments, the gas in the gas delivery pipeline can be at a relatively high temperature of 30-80°C.

[0058] In some embodiments, the guide 110 includes a gas inlet 111 that extends into the first receiving device 120. This arrangement prevents gas leakage and improves the accuracy of measuring the total volume of gas in the sampling device.

[0059] In some embodiments, the gas inlet 111 includes a gas conduit, which may arbitrarily include a hose and a pipe with a certain rigidity.

[0060] In some embodiments, the flow guide 110 further includes a flow regulating valve. This valve can be installed on a gas conduit, through which the medium to be detected flows in and out. The opening degree of the flow regulating valve is adjusted according to the state of the medium contained in the first receiving device or the medium to be detected, or according to the flow rate of the gas at the discharge end.

[0061] In some embodiments, the detection system further includes a gas discharge component 112 connected to the trap assembly 130 for discharging the initial filtered medium. In some embodiments, the first detection device can be connected to the gas discharge component 112 for detecting the total volume of the filtered medium to be tested, which can prevent damage or wear to the first detection device caused by excessive impurities in the medium to be tested.

[0062] In some embodiments, the detection system may further include a thermometer and a U-shaped pressure gauge, which are respectively connected to the gas discharge component 112 and are used to detect the temperature and pressure of the primary filter medium.

[0063] In some embodiments, the flow guide 110 further includes a first airflow distribution member 113, which is disposed at the outlet of the gas inlet 111 located at the first receiving device 120, and is used to transport the medium to be tested.

[0064] According to the embodiments of this application, the first airflow distributor 113 can make the medium to be detected more dispersed and more uniformly reach the first containing device 120, and can avoid droplet splashing when liquid phase components are retained in the first containing device 120.

[0065] In some embodiments, the first airflow distribution member 113 is a first airflow plate, and the first airflow plate has a plurality of first through holes.

[0066] In some embodiments, the trap delivery assembly 130 includes a second receiving device and a packing 131 filled in the second receiving device, the packing 131 having pores formed therein for trapping the component to be detected.

[0067] According to the embodiments of this application, the packing material can be composed of stainless steel wire mesh packing, stainless steel wire packing, etc. The pores in the packing material 131 facilitate the passage of the medium to be tested and also allow dust in the medium to be retained; the pores in the packing material 131 increase the contact area between the medium to be tested and the packing material, making the dust retention more complete.

[0068] In some embodiments, the first receiving device 120 and the second receiving device can be made of metal materials such as stainless steel, which facilitates heat conduction and corrosion resistance.

[0069] In some embodiments, a second airflow distribution member 132 is provided at the junction of the first receiving device 120 and the interceptor conveying assembly 130.

[0070] Optionally, the second airflow distributor 132 is a second airflow plate, which has multiple second through holes. The aforementioned second airflow distributor 132 can make the medium to be detected more dispersed and uniformly reach the second receiving device, and can also support the packing material.

[0071] In some embodiments, the detection system further includes a cooling assembly 400 disposed around the first receiving device 120 and the interceptor conveying assembly 130, for cooling and intercepting the analyte in the first receiving device 130 and the interceptor conveying assembly 130. The cooling assembly can increase the capacity of the first receiving device 120 and improve the interception effect in the interceptor conveying assembly 130.

[0072] In some embodiments, the cooling assembly 400 includes a first cooling element 410 and a second cooling element 420.

[0073] The first cooling element 410 is located around the first containing device 120 and is used to cool and liquefy some components of the medium to be tested in the first containing device 120.

[0074] The second cooling element 420 is located around the interceptor conveying assembly 120 and is used to cool and intercept some components of the medium to be tested in the interceptor conveying assembly 120.

[0075] In some embodiments, the first cooling element 410 is a cooling bath containing coolant, and the first receiving device 120 is placed in the coolant.

[0076] Optionally, the target cooling temperature of the first cooling element is ≤20℃, or optionally ≤0℃.

[0077] In this embodiment, the medium to be tested entering the first containing device may have a relatively high flow rate, high pressure, and high oil dust content. To further improve the containing effect, a coolant with a lower temperature is used to cool the medium to be tested contained in the first containing device, which can regulate its pressure and flow rate. Furthermore, at a lower temperature, water vapor and tar in the medium to be tested are cooled and liquefied, thus contained within the first containing device. To better liquefy the water vapor and tar in the medium to be tested, the target cooling temperature is ≤20°C, and can be selected as ≤0°C.

[0078] In some embodiments, the second cooling element 420 is a cooling jacket;

[0079] Optionally, the target cooling temperature of the second cooling element is ≤-20℃.

[0080] In this embodiment, a threaded cap can be provided on the surface of the refrigeration jacket for easy disassembly. The flow rate of the medium to be tested flowing out of the first receiving device is likely still relatively fast, with high pressure and high temperature (insufficient to liquefy the light hydrocarbon components); to further accurately measure the dust content in the medium to be tested, a lower-temperature refrigeration jacket is used to cool it, which can regulate its pressure and flow rate. Furthermore, at a lower temperature, the light hydrocarbon components in the medium to be tested liquefy, and the dust is also retained in the interceptor conveying assembly. To better liquefy the light hydrocarbon components in the medium to be tested, the target cooling temperature is ≤-20°C. When the medium to be tested is raw coal gas, the aforementioned light hydrocarbon components include saturated hydrocarbons with fewer than C8, olefins with fewer than C8, aromatic hydrocarbons with fewer than C8, etc.

[0081] See also Figure 3 , Figure 3 A schematic flowchart of a detection method for determining gas components provided in a second aspect embodiment of this application is shown.

[0082] like Figure 2 and Figure 3 As shown, embodiments of the second aspect of this application also provide a detection method for determining the components of a fuel gas, employing the detection system of any of the embodiments of the first aspect described above. The method includes:

[0083] S100. To buffer and retain the medium to be tested, thereby reducing the flow rate of the medium to be tested;

[0084] S200. At least some components in the medium to be tested are retained to obtain the initial filter medium;

[0085] S300. Obtain the total volume of the medium to be tested from the air inlet or exhaust outlet;

[0086] S400. Obtain the mass of the retained component from the buffer retrieval point and the retention point;

[0087] S500. The content of each component in the medium to be tested is obtained based on the total volume of the medium to be tested and the mass of the retained components.

[0088] According to the embodiments of this application, by buffering and retaining the medium to be tested and trapping at least some components in the medium, the flow rate of the medium to be tested is reduced, and the trapped components can be detected, thereby realizing the detection of the components in the medium to be tested. This avoids the inaccuracy of detection results caused by the direct use of filters, filter membranes, etc., which are easily damaged in related technologies.

[0089] In some embodiments, the method specifically includes:

[0090] Under the first cooling condition, the medium to be tested is buffered and retained to reduce the flow rate of the medium to be tested and to liquefy at least some components in the medium to be tested;

[0091] Under the second cooling condition, at least some components in the medium to be tested are retained to obtain the initial filter medium;

[0092] Obtain the total volume of the medium to be tested from its inlet or outlet.

[0093] The mass of the liquefied component and the mass of the retained dust were obtained at the buffer retention point and the interception point, respectively.

[0094] The content of each component in the medium to be tested is calculated based on the total volume of the medium to be tested, the mass of the liquefied components, and the mass of the trapped dust.

[0095] According to the embodiments of this application, the first cooling and the second cooling can be the same target cooling temperature or different target cooling temperatures; from the perspective of saving energy and achieving the goal, the temperature of the first cooling is higher than the temperature of the second cooling. The second cooling temperature can further liquefy tar and water vapor, and can also liquefy some light hydrocarbon components, enabling accurate measurement of each component.

[0096] According to an embodiment of this application, the first cooling condition can be the temperature at which moisture and tar in the raw coal gas condense, thereby cooling the raw coal gas to obtain a liquid mixture of moisture and tar. The second cooling condition can be the temperature at which light hydrocarbon components in the raw coal gas condense.

[0097] In some embodiments, S400 specifically includes:

[0098] Dissolve the retentate component in the solvent to obtain a first mixture;

[0099] The liquid phase component in the buffer retrieval area is mixed with the first mixture to obtain a second mixture;

[0100] The volume of the second mixture, the moisture content of the second mixture, and the dust content of the second mixture are measured to obtain the water mass and dust mass.

[0101] According to the embodiments of this application, components trapped in the packing material, including dust and some tar, can be washed with solvent, which can make all components completely redundant in the solvent, improve the uniformity of components in the solvent, and make the measurement results more accurate.

[0102] According to embodiments of this application, the moisture, tar, and dust content in fuel gas, such as raw coal gas, can be determined based on gravimetric methods, mechanical impurity determination methods for petroleum and petroleum products and additives, and Karl Fischer moisture determination methods.

[0103] In some embodiments, the solvent may be toluene, methanol, or a combination thereof. The use of solvent should not introduce new moisture content or other impurities. The sampling device and related guide components, such as connecting tubing, can be flushed in small, repeated flushes before all solution is collected. After flushing the retrieval conveyor assembly, it can be dried on a heating device before being reinstalled in the detection system.

[0104] For example, using such Figure 2 The detection system shown uses a weighing device such as an electronic scale to weigh the initial weight of the first container, denoted as M1. Raw coal gas is sampled, and the volume is denoted as V. After sampling, the mass of the first container is M2. A solvent washing and interception device is used to transfer the washed solvent into the first container, mixing it with the liquid phase components in the first container. The first container is then weighed, and this final mass is M3. The moisture content W is measured using a moisture content measuring device. 水 The water mass is obtained as M4, where M4 = (M3 - M1) × W 水 The moisture content in the raw coal gas is M4 / V. The moisture content W is determined using a dust content measuring device. 粉尘 The dust mass M5 is obtained, where M5 = (M3 - M1) × W 粉尘 The dust content in the raw coal gas is M5 / V. ​​The mass of tar is M6, M6 = (M2 - M1 - M4 - M5), and the tar content in the raw coal gas is M6 / V.

[0105] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0106] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A detection system for determining components of a gas, comprising: a sampling device, comprising a flow guide, a first containing device, and a trap delivery assembly, wherein a medium to be detected flows into the flow guide, and then into the first containing device for buffering and retention, and then into the trap delivery assembly for trapping components to be detected, and then discharging a primary filtration medium; the flow guide further comprises a first gas flow distribution member, which is arranged at an outlet of a gas inlet member of the first containing device, and is used for delivering the medium to be detected; the trap delivery assembly comprises a second containing device and a filler filled in the second containing device, wherein the filler has pores for trapping components to be detected, and a second gas flow distribution member is arranged at a joint of the first containing device and the trap delivery assembly; a cooling assembly arranged at the periphery of the first containing device and the trap delivery assembly, and used for cooling and trapping components to be detected in the first containing device and the trap delivery assembly; the cooling assembly comprises a first cooling member and a second cooling member, wherein the first cooling member is arranged at the periphery of the first containing device, and is used for cooling and liquefying part of the components of the medium to be detected in the first containing device; the second cooling member is arranged at the periphery of the trap delivery assembly, and is used for cooling and trapping part of the components of the medium to be detected in the trap delivery assembly; the target cooling temperature of the first cooling member is ≤0℃; and the target cooling temperature of the second cooling member is ≤-20℃; a first detection device connected to the sampling device, and used for determining the total volume of the medium to be detected in the sampling device; and a second detection device, used for determining the content of liquid components in the medium to be detected buffered and retained in the first containing device.

2. The detection system of claim 1, wherein, The flow guide comprises a gas inlet member, which extends into the first containing device.

3. The detection system of claim 1, wherein, The first gas flow distribution member is a first gas flow plate, which is provided with a plurality of first through holes.

4. The detection system of claim 1, wherein, The second gas flow distribution member is a second gas flow plate, which is provided with a plurality of second through holes.

5. The detection system of claim 1, wherein, The first cooling member is a refrigeration bath, which contains a cooling liquid, and the first containing device is arranged in the cooling liquid.

6. The detection system of claim 1, wherein, The second cooling member is a refrigeration jacket. 7.A detection method for determining components of a gas by using the detection system according to any one of claims 1-6, comprising: buffering and retaining the medium to be detected, so as to reduce the flow speed of the medium to be detected; trapping at least part of the components in the medium to be detected, so as to obtain a primary filtration medium; obtaining the total volume of the medium to be detected from an inlet or an outlet of the medium to be detected; obtaining the mass of the trapped components from the buffering and retaining position and the trapping position; determining the content of each component in the medium to be detected according to the total volume of the medium to be detected and the mass of the trapped components.

8. The detection method according to claim 7, characterized in that, The method specifically comprises: buffering and retaining the medium to be detected under the condition of the first cooling, so as to reduce the flow speed of the medium to be detected and liquefy at least part of the components in the medium to be detected. In the second cooling condition, at least part of the components in the medium to be detected are intercepted to obtain a primary filtration medium; The total volume of the medium to be detected is obtained from the inlet or outlet of the medium to be detected; The mass of the liquefied components and the mass of the intercepted dust are obtained from the buffer retention and interception respectively; The content of each component in the medium to be detected is calculated according to the total volume of the medium to be detected, the mass of the liquefied components and the mass of the intercepted dust.

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